US 2009/0214813 A1 · POLYMER FIBER CONTAINING FLAME RETARDANT, PROCESS FOR PRODUCING THE SAME, AND MATERIAL CONTAINING SUCH FIBERS

Abstract

A flame retardant polymer fiber, a process for making such a fiber, and a material containing such fibers are provided. The flame retardant polymer fiber is a high tenacity fiber formed of a poly(trimethylene terephthalate) co-polymer containing a trimethylene terephthalate monomer and a phosphorous containing flame retardant monomer. The flame retardant PTT co-polymer fiber is produced by a process in which the trimethylene terephthalate monomer or its precursors and the phosphorous containing flame retardant monomer or its precursors are combined to form the PTT co-polymer in one or more pre-polymerization and polymerization steps, and the PTT co-polymer is spun into a fiber. Materials including such flame retardant PTT co-polymer fibers, e.g. carpets and textiles, are also provided.

Claims15

Dependent claims

A flame retardant polyester fiber comprised of a polymer formed of from 50 mol % to 99.9 mol % of a trimethylene terephthalate component of formula (I) and from 0.1 mol % to 50 mol % of a phosphorous containing component of formula (II)

where p is from 1 to 2500, q is from 1 to 1250, and R1 is an alkyl alcohol residuum having from 1 to 5 carbon atoms, an alkyl acid residuum having from 1 to 5 carbon atoms, an alkyl ester residuum having from 1 to 5 carbon atoms, or an oxygen atom;
where the fiber has a tenacity of at least 1.5 g/d.

A process for producing a flame retardant polyester fiber, comprising:

providing a flame retardant poly(trimethylene terephthalate) co-polymer comprising from 50 mol % to 99.9 mol % of a trimethylene terephthalate component of formula (I) and from 0.1 mol % to 50 mol % of a phosphorous containing component of formula (II)
where p is from 1 to 2500, q is from 1 to 1250, and R1 is an alkyl alcohol residuum having from 1 to 5 carbon atoms, an alkyl acid residuum having from 1 to 5 carbon atoms, an alkyl ester residuum having from 1 to 5 carbon atoms, or an oxygen atom;
heating the poly(trimethylene terephthalate) co-polymer to a temperature of from 240° C. to 280° C. to melt the co-polymer;
and
passing the molten poly(trimethylene terephthalate) co-polymer through a spinneret to form a fiber.

2 more elements

Dependencies are inferred from the claim text.

Polymer fiber containing flame retardant, process for producing the same, and material containing such fibers

Life of this patent

Polymer fiber containing flame retardant, process for producing the same, and material containing such fibers

Life of this patent

Abstract

Claims15